drewwood5

i have a 99 firebird auto v8,
its fast, but the problem is that wen full throttle
it red lines
it doesnt shift till it redlines for a sec, then i tap the accel
it has hypertech tuner, (from the previous owner) but i dont no how to fix it, and i dont hav the tuner that came with it

joelster

I've posted this before but here goes. The transmission is slipping a little bit. It can't handle the power your car is putting out at redline. If you let of the gas just a little bit when it hits redline, it will shift instantly. You can try to play around with the shift points through the hypertech tuner, and you may get it a little better, but most likely a rebuild is in order. There are very few reputable shops that can build a 4L60E, the cost is around 1500 bucks, but they are bulletproof when done.

Not to scare you or anything, but the transmission will work fine and seem flawless at anything under full throttle. You can drive a severly slipping tranny all day and night if you just cruise around.

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1994 Z28 Black heads/cam th350 drag car
1995 Z28 Teal 'Vert bolt-ons 6-speed cruiser

FirebirdPhil

x2 and welcome to the forum!

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"What if I told you insane was working fifty hours a week in some office for fifty years at the end of which they tell you to piss off; ending up in some retirement village hoping to die before suffering the indignity of trying to make it to the toilet on time? Wouldn't you consider that to be insane?"
-Steve Buscemi as Garland Greene in Con Air